%0 Journal Article %A S. G. Mikhlin %T Error of the Bubnov--Galerkin method for elliptic boundary-value problems %J Zapiski Nauchnykh Seminarov POMI %D 1981 %P 137-144 %V 111 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1981_111_a9/ %G ru %F ZNSL_1981_111_a9